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Finding the Fourth Proportional to 290,600.64, 435,926.16 and 80,238.72

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Solution

The fourth proportional to 290,600.64, 435,926.16 and 80,238.72 is: 120,365.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,600.64 : 435,926.16 = 80,238.72 : x
  2. Step 2: Convert to fraction form
    290,600.64/435,926.16 = 80,238.72/x
  3. Step 3: Cross multiply
    290,600.64x = 435,926.16 × 80,238.72
  4. Step 4: Simplify right side
    290,600.64x = 34,978,157,092.92
  5. Step 5: Solve for x
    x = 34,978,157,092.92/290,600.64
  6. Step 6: Final answer
    x = 120,365.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.